bug#5475: Archives with filenames with square brackets

[Drew Adams]

> > I just want to mention that my company, which is a large 
> > software company, asked _everyone_ a few months back to 
> > install 7zip and get rid of Winzip from our work
> > computers. I believe the reason was to save money somehow.
> 
> We support "unzip", not WinZip.

My point was not about WinZip; it was about 7zip: it might be that more people
will use 7zip than has been true in the past.

That's all. HTH.